Heater.



O. S. BEYER.

HEATER.

APPLICATION FILED NOV. 26, 1909.

l,5? %41 Patented Apr. 1, 1913.

3 SHEETS-SHEET 1.

0. S. BEYER.

HEATER.

APPLICATION FILED NOV. 2 1909.

Q Q Patented Apr. 1, 1913.

3 SHEETS-SHEET 2.

Wrrplz 5 E: 5:

zczawaM 0. S. BEYER.

HEATER.

APPLIUATION FILED NOV. 26, 1909.

Patented Apr. 1, 1913.

3 SHEETSSHEET 3.

I mil N IN [N WITHEEEEE rinrrno STATES earner @FFTQE.

OTTO S. BEYER, 0F HYDE PARK, 'MASSACHUSETTS, ASSIGNOR TO F. STURTEVANT COMPANY, OFBOS'ION, MASSACHUSETTS, A 'CORIORATION OF MASSACHUSETTS. I

HEATER.

Specification of Letters Patent.

Patented Apr. it, 1913.

Application filed November 26, 1909. Serial No. 529,879.

The invention relates to radiators or heaters, and more particularly to radiators or radiator units which are formed from sheet metal.

It is one of the objects of the invention to provide a sheet metal radiator or radiator section which may be conveniently and economically manufactured, and which will be substantially free'from the corrosive action due to the collection of water of condensation, and therefore not liable to become defective under continued use even when made from comparatively thin material.

It is a further object of the invention to provide a multiple section heater which will give a large heating area within a compact space, and will act upon the air passing through the sections in amore eflicient manner than the usual pipe heater heretofore in use in high pressure installations.

With these objects in View the invention consists in the features of construction and rombination of parts hereinafter described and set forth in the claim;

- The various features of the invention will be understood from an inspection of the accompanying drawings, and the following detailed description of the heaters shown therein.

In the drawings Figure 1 ,is an end elevation partly in section of a multiple section heaterembodying the invention; Fig. 2 is a vertical sectional View showing the heater sections in elevation; Fig; 3 is a horizontal sectional View through t ree of the heater sections showirig the relative arrangement of the sections; ig. 4 is a vertical sectional view similar to Fig. 2, showing a modified form of heater; and Fig. 5 is an end eleva pai on of the upper part of the heater shown in Tn the drawings the invention is illustrated as embodied in a multlple section heater especially adapted for use in heating air in ventilating, drying, or other inst-allations, in which comparatively large volumes of air are to be heated and handled.

As shown, the sections of the heater are arranged within a casing 1, the ends of which are open, and are connected with the conduits or chambers through which the flow of air is produced in the usual manner by means of fans or otherwise.

Each section of the heater is formed from a single metal sheet, preferably steel, which is stamped or pressed to form the desired depressions therein, and is then folded through the center to bring the faces of the sections on opposite sides of the fold together, the contacting marginal portions or edges of the sections, and the other contacting surfaces of the sections being then' united, preferably by electric welding. The radiator or heater section is so arranged that the transverse fold at the center of the sheet forms the bottom of the radiator, and the outlet for the steam and water of condensation is formed in this seamless bottom of the radiator by stamping or pressing out the metal previous to the folding of the sheet to form a flange or nipple to which a threaded union may be secured by electric welding or otherwise. The sheet of metal is preferably so stamped or ressed that the seamlessbottom of the ra iatoris inclined toward the outlet, so that/there can be no collection of water of condensation at any point where a crevice or joint occurs, and the dan er of corrosion is conse uently eliminate In case the inlet as wel as the outlet o-penin; for the radiator or radiator section is located at the bottom of the radiator, this opening is also formed in the seamless bottom, and the sheet is so stamped or pressed that the bottom is inclined from the center in opposite directions toward the inlet and outlet openings.

In forming radiator sections for use in multiple section heaters for high pressure installations, it is referred to employ the construction and shown in thedrawings. As shown in Figs. 1, 2 and 3 of the drawings, each radiator section is formed from a single sheet ofsteel, or other suitable material, which is so shaped by suitable dies that when it is orm of radiator section folded to bring the sections on opposite sides of the fold face to face, a transverse passage or tube 2is formed at the bottom of the radiator. In the case of comparatively large radiators such as shown, the transverse depression is so formed that vertically extending contacting faces are provided at 3 midway of the radiator which extends upward from the bottom across the transverse depression. The transverse depression is also so formed that the seamless bottom of the radiator formed by the fold in the sheet inclines toward the inlet or outlet openings at. These inlet and outlet openings are formed by perforating the metal in the bottom of the transverse depression, and pressing or bending the metal around the perforations outward to form a flange 5 to which a union 6 may be secured, as by electric welding. The metal sheet is also so stamped or pressed that the sections of the sheet on opposite sides of the fold are provided with semi-tubular depressions extending from the ends of the transverse depressions around the edges of the sheet at a short distance from the edge, so as to leave mar gmal surfaces 7 at the edges, which arebrought into contact when the plate is folded, and may be united by any suitable means, as by electric welding. When the marginal edges are united, these semi-tubular marginal depressions form vertical passages or tubes 8 and 9, and an upper transverse passage or tube 10, which is connected with the bottom tube or tubes by the tubes 8 and 9. Additional semi-tubular depressions are also formed in the sheet, and form the vertical tubes-11 extending between the top andbottom tubes in the completed radiator.

The vertical passages or tubes of the radiator preferably intercommunicate with each other through horizontal passages 12 formed by shallow semi-tubular depressions in the metal sheet. In case both the-inlet and outlet for the radiator section are formed in the bottom of the section, it is preferred to omit the transverse passages 12 between the two adjacent vertical tubes at the center of the section, except near the top of the section. With this construction the contacting surfaces between the two center vertical tubes or passages may be united, electric welding, so that the steam entering at one side of the center of the section will pass .upward through that side of the section and downward through the other side of the section, and thus an eflicient distribution of the steamwillbeefifected. The comparatively restricted transverse passages 12 between the vertical tubes or passages causes an efiicient breaking up and distribu 'tion of the steam, and adds to the efliciency of the heater section.

The location of the outlet for the watch of condensation in the seamless bottom of the radiator, and below the joint at the sages of the radiator is the breadth of the radiator. With this construction the radiator sections may ported or hung from the upper header, as indicated in Fig. 5. r

edges' of the folded sheet, is an important.

feature of the invention. By thus arranging the outlet for the water of condensation, there is no danger that water will collect iii any crevice or crack in the joint betweenthe edges of the sheet, and thus the danger of corrosion and weakening of the joint during long continued use is eliminated or reduced to a minimum. This enables the useof a thinner metal than could otherwise beused, with a resulting decrease in the weight and cost of material, and an increase in the facility with which the metal sheets may be stamped or pressed and folded into the desired form. a

In embodying these radiator sections in amultiple section heater, the inlet unions 6 are connected to a header 13 by screw threaded nipples 14, and the outlet unions 6 are connected by similar nipples 15" with a header 16. In connecting the radiator sections with the headers, the sections are so pass. A large heating area is thus providedan a comparatively small space, and the heating surfaces are also arranged. to secure an effective transmission of the heat to the air passing over the heating surfaces. As the air flows through the sinuous passages between the plates, it is deflected back and forth from one plate to the otherfa-nd thus brought into intimate contact with the heating surfaces without the formation of the eddies or counter-currents which are produced in the usual constructlon of pipe.

heaters provided with staggered pipes. I 1

Instead of arranging both the inlet and outlet headers and the inlet and outlet openings to the heater sections at the bottom of the heater, they may be arranged as indicated in Fig. 4. As here shown, the outlet opening through which the water of condensation escapes from the radiator or heater section is formed in the center of the seamless bottom, and the bottom of the radiator is inclined from each side toward the outlet. The inlet 18 is formed at the upper end ofthe radiator or heater section, and is connected with the inlet header 19 through a nipple 17. .In this case the flow of steam is from th upper end of the radiator toward the lower end, and communication between the adjacent vertical tubes or pasbe supv 2 provided throughout In constructing radiator sections of comparatively large heating area, and especially if the sections are to be used in high pressure instal1ations,-'it is preferred to secure the contacting surfaces between the transverse passages 12 by electric welding or other means. By thus uniting the 0p osing walls of the radiator,- it is given su cient strength to resist high pressures, even when formed of comparatively thin sheets of metal.

While it is preferred to employ the specific construction'and arrangement shown and described, it will be understood that this construction and arrangement is not essential, and may be varied in accordance with the size of the radiator or heater sections, or to suit the conditions under which the radiator orheater sections are to be used, without departing from the invention.

Having explained the nature and object of the invention, and specifically described certain forms of radiators in which it may be embodied, what I claim is A radiator comprising a series of sections,.each of said sections being composed of a single plate of sheet metal folded midway its ends to form adjacent plates having a seamless bottom connection, and each of said plates being provided with marginal joining flanges at its top and sides, and with vertical and horizontal semi-tubular depressions on their inner sides forming passages for the heating fluid, and with vertical and horizontal convex surfaces on their outer sides by which the currents of air passing between the radiator sections exp-and successively into the pockets formed between such convex surfaces.

* orro s. BEYER.

Witnesses N. D. MOPHAIL, WARREN G. ODGEN. 

